Cases/EV/C12
EV / New EnergyMotor-plant lines / e-drive assembly EOL stations

EV Motor End-of-Line (EOL) Whine Evaluation

01

Pain Points

  • !Each EOL station has only seconds of cycle time, so manual waterfall reading can't go on the line.
  • !Whine is a narrowband tone; overall level misses it — you must check whether a specific order stands out within an RPM segment.
  • !Line evaluation must be traceable and recomputable, not left to a veteran's ear.
02

The Tinia Approach

Short-sweep resampling into the order domain, extraction of the target-order amplitude and tonal prominence, and threshold evaluation — the SDK stays resident at the station and returns results within cycle time.

Order trackingTonal prominenceRPM-segment aggregationPASS/FAILSDK to MES
03

Nodes Used

Order Trackingorder_tracking
Short-sweep resampling into the order domain
Tonalitytonality
Narrowband whine-prominence assessment
Indicator Mathindicator_math
Target-order amplitude + RPM-segment aggregation
Spec Limit Checkspec_limit_check
Line-threshold PASS / FAIL

Core nodes; add or remove steps as needed for your data and standards — the node graph is always editable.

04

Expected Output

  • Target-order amplitude and tonal prominence for each motor.
  • A within-cycle-time PASS / FAIL result, connectable to the line MES via SDK.
  • An end-of-line record with explicit, queryable, recomputable thresholds and conventions.
Reference Standards / Engineering PracticeEngineering practice · OEM EOL internal-control standards

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